How are Bernard and Helmholtz alike?

In Aldous Huxley's Brave New World, Bernard and Helmholtz both feel like outsiders in the civilized world. Both of them are Alpha-Plus males who perceive themselves as being different from those around them.
Bernard is very short, which is rumoured to have been caused by alcohol in his blood surrogate. Because of this, Bernard has spent his entire life feeling isolated from other Alpha-Plus males. Helmholtz is incredibly intelligent. He is especially skilled at creating slogans and rhymes, and his superiors look down on him for being too competent in his work as an emotional engineer.
Until John arrives in the civilized world, Bernard and Helmholtz seem to be alone in recognizing that they are individuals. We read the following in chapter four:

A mental excess had produced in Helmholtz Watson effects very similar to those which, in Bernard Marx, were the result of a physical defect. . . . What the two men shared was the knowledge that they were individuals.

Both Bernard and Helmholtz have a longing in them which no pleasure or entertainment in this civilized world can satisfy. Both of them are no longer content with sex, soma, and social activities to fill their desires. Bernard finds joy in hovering his helicopter over the ocean at night and contemplating his life's meaning. He tells Lenina,

It makes me feel as though..." he hesitated, searching for words with which to express himself, "as though I were more me, if you see what I mean. More on my own, not so completely a part of something else. Not just a cell in the social body.

Likewise, Helmholtz desires to be able to fully express himself without the constraints of his conditioning. He says to Bernard,

I'm thinking of a queer feeling I sometimes get, a feeling that I've got something important to say and the power to say it—only I don't know what it is, and I can't make any use of the power.

Helmholtz's and Bernard's differences allow them to experience emotions which are inaccessible to other members of their society.